在 Dynamics CRM 的自定义工作流活动中使用 httpClient 发送 POST 请求会引发异常“ThreadAbortException”

Question

我的任务是检索在名为“Denunciation”的实体中创建的数据，然后进行一些结构化并将这些数据（以 JSON 字符串格式）发送到 API，因此我需要发出 POST 请求，一切正常，但当我想要时发送post请求，它抛出这个异常

异常详情：

System.Threading.ThreadAbortException
  HResult=0x80131530
  Message=The thread has been abandoned.
  Source=System
  StackTrace:
   at System.Net.CookieModule.OnSendingHeaders(HttpWebRequest httpWebRequest)
   at System.Net.HttpWebRequest.UpdateHeaders()
   at System.Net.HttpWebRequest.SubmitRequest(ServicePoint servicePoint)
   at System.Net.HttpWebRequest.BeginGetRequestStream(AsyncCallback callback, Object state)
   at System.Net.Http.HttpClientHandler.StartGettingRequestStream(RequestState state)
   at System.Net.Http.HttpClientHandler.PrepareAndStartContentUpload(RequestState state)
--- End of stack trace from previous location ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at HclsDeclareProspect.DeclareProspect.<Execute>d__28.MoveNext() in C:\Users\aimad.quouninich\Desktop\Projects\VDN\HclsDeclareProspect\DeclareProspect.cs:line 177

  This exception was originally thrown at this call stack:
    [External Code]
    HclsDeclareProspect.DeclareProspect.Execute(System.Activities.CodeActivityContext) in DeclareProspect.cs

我在execute方法中的代码：

// Send POST request APIM
CanalItem endpoint = CanalProvider.Retrieve(service, endpointReference);
_trace += string.Format("Endpoint : {0} \r\n", endpoint.Name);
_trace += string.Format("Endpoint Url : {0} \r\n", endpoint.Url);
_trace += string.Format("Endpoint Login : {0} \r\n", endpoint.Login);
_trace += string.Format("Endpoint Login : {0} \r\n", endpoint.Password);

string url = $"{endpoint.Url}/denunciation";

var content = new StringContent(requestJSON.ToString(), Encoding.UTF8, "application/json");
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

HttpClient client = new HttpClient();

client.DefaultRequestHeaders.Add("Apim-Subscription-Key", endpoint.Password);

try
{
    var result = await client.PostAsync(url, content);
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}

如果我删除了 try-catch 块，自定义工作流程和

pluginRegistrationTool

将退出，没有任何错误消息，并且后续行代码将不会执行。

我尝试了很多方法，例如使用 httpWebRequest 而不是 httpClient，但是当我尝试写入流时，它存在以下错误：

System.Security.SecurityException
  HResult=0x8013150A
  Message=Type Authorization Request Failed 'System.Net.WebPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
  Source=mscorlib
  StackTrace:
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.CodeAccessPermission.Demand()
   at System.Net.HttpWebRequest.get_Proxy()
   at System.Net.WebRequest.GetRequestStreamAsync()
   at HclsDeclareProspect.DeclareProspect.<Execute>d__29.MoveNext() in C:\Users\aimad.quouninich\Desktop\Projects\VDN\HclsDeclareProspect\DeclareProspect.cs:line 186

  This exception was originally thrown at this call stack:
    [External Code]
    HclsDeclareProspect.DeclareProspect.Execute(System.Activities.CodeActivityContext) in DeclareProspect.cs

将此代码用于 HttpWebrequest 来代替 httpClient：

字符串 url = $"{endpoint.Url}/denunciation";

var content = new StringContent(requestJSON.ToString(), Encoding.UTF8, "application/json");
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

var request = (HttpWebRequest)WebRequest.Create(new Uri(url));
request.ContentType = "application/json";
request.Method = "POST";
request.Timeout = 4000; //ms
var itemToSend = JsonConvert.SerializeObject(requestJSON);
using (var streamWriter = new StreamWriter(await request.GetRequestStreamAsync()))
{
    streamWriter.Write(itemToSend);
    streamWriter.Flush();
    streamWriter.Dispose();
}

// Send the request to the server and wait for the response:  
using (var response = await request.GetResponseAsync())
{
    // Get a stream representation of the HTTP web response:  
    using (var stream = response.GetResponseStream())
    {
        var reader = new StreamReader(stream);
        var message = reader.ReadToEnd();
    }
}

我不知道该怎么办，请任何帮助。

Answer 1

解决了，

问题出在 Newtonsoft.json 包中。看起来 CRM 不接受外部包/程序集，并且工具 Ilmerge（用于合并多个程序集）已被弃用，CRM 不再支持。

当运行调试器并且进程是异步的时，我没有注意到问题并且工作正常，因此我删除了 Newtonsoft.json 并使用了内置解决方案，即 DataContractSerializer，然后使用 Trace log 我能够看到该帖子有效很好，但是在调试时它不起作用，程序只是退出，解决方案是将断点放在 post 请求代码行之后，以便能够看到结果。

我希望这能帮助其他有同样问题的人。